[R] frequence of patterns in a vector
liujulia7 at yahoo.com
Fri May 29 20:15:04 CEST 2009
Dear R users,
Suppose I have a vector that consists of characters like ABC, A02, RCA,
etc., and there are about 700 of possible characters. For example,
x <- c("ABC", "ABC", "ABC", "A02", "ABC", "RCA", "ABC", "ABC")
I'd like to get a frequency matrix that looks something like this:
I have like 1M numbers of vectors like x (that can have different length
too). How do I do this?
Thank you very much in advance,
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